[R] How to count rows with a condition

[fxen3k]

Hi,

I have a dataset called "data". There is one row called "ac_name". Some
names in this column appear very often, some less. 
What I want is to filter this dataset with the following condition:

Exclude the names, which appear more than five times. (example: House A
appears 8 times ==> exclude it; House B appears 5 times ==> include it etc.)

In the end, I want to have the old "data" dataset excluding the rows with
the above mentioned condition and another list with all the names which have
been excluded.


I think for one of the professionals amongst you this is pretty easy to
solve. ;-)

Thanks dudes!

Cheerio,
Felix



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